Table 2.
Singlet oxygen quantum yields (ΦΔ, in %) in different solvents.a
| Compounds | CHX | HEX | TOL | DCM | ACN |
|
| |||||
| NI-PTZ-F | 12 | 18 | 0 | –b | –b |
| NI-PTZ-Ph | 14 | 18 | 1 | –b | –b |
| NI-PTZ-CH 3 | 15 | 17 | 0 | –b | –b |
| NI-PTZ-OCH 3 | 14 | 23 | 2 | –b | –b |
| NI-PTZ-C 5 | 17 | 19 | 1 | –b | –b |
| NI-PTZ-F-O | 25 | 30 | 50 | 100 | 100 |
| NI-PTZ-Ph-O | 23 | 26 | 46 | 100 | 90 |
| NI-PTZ-C 5 -O | 28 | 36 | 48 | 100 | 96 |
aThe ET (30) values of the solvents are 30.9 (CHX), 31.0 (HEX), 33.9 (TOL), 40.7 (DCM), and 45.6 (ACN), respectively, in kcal mol−1. Singlet oxygen quantum yield (ΦΔ) with Ru(bpy)3[PF6]2 as standard (ΦΔ = 0.57 in DCM) in different solvents; λex = 340 nm; bnot observed.